Tension detection apparatus of endless loop power transferring member and torque detection apparatus using the same

摘要

A controller (28) computes an unbalanced load applied to a boss (13) based on the tension of a belt (18) through a compressor pulley (14), a bearing (20) and a tolerance ring. The controller computes the tension acting on belt based on the computed unbalanced load. The tolerance ring is located between the boss of a housing (11) and the inner race of bearing. The deformation of tolerance ring varies in accordance with the tension of belt. Strain gauges determine the deformation amount of tolerance ring in at least two positions that are spaced from each other in circumferential direction of the bearing. An independent claim is also included for a torque detection apparatus.